CN109532462A - Bi-motor couples planet Traction Drive bearing type reduction electric hub - Google Patents
Bi-motor couples planet Traction Drive bearing type reduction electric hub Download PDFInfo
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- CN109532462A CN109532462A CN201811407553.3A CN201811407553A CN109532462A CN 109532462 A CN109532462 A CN 109532462A CN 201811407553 A CN201811407553 A CN 201811407553A CN 109532462 A CN109532462 A CN 109532462A
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- China
- Prior art keywords
- planet
- bearing type
- traction drive
- drive bearing
- speed reducer
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K7/0007—Disposition of motor in, or adjacent to, traction wheel the motor being electric
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K17/00—Arrangement or mounting of transmissions in vehicles
- B60K17/04—Arrangement or mounting of transmissions in vehicles characterised by arrangement, location, or kind of gearing
- B60K17/043—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel
- B60K17/046—Transmission unit disposed in on near the vehicle wheel, or between the differential gear unit and the wheel with planetary gearing having orbital motion
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/003—Disposition of motor in, or adjacent to, traction wheel with two or more motors driving a single wheel
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
- B60K7/00—Disposition of motor in, or adjacent to, traction wheel
- B60K2007/0061—Disposition of motor in, or adjacent to, traction wheel the motor axle being parallel to the wheel axle
Abstract
The invention discloses a kind of bi-motors to couple planet Traction Drive bearing type reduction electric hub, including wheel hub, is set to the intracorporal planet Traction Drive bearing type speed reducer of wheel hub cavity and one, No. two motor；The combined in any order of sun gear, planet carrier, outer ring three in the planet Traction Drive bearing type speed reducer corresponds respectively to power intake, power output end and intermediate transmission component in planet Traction Drive bearing type speed reducer, the No.1 motor driven power intake is used to provide power and passes through power output end drive hub and rotates, and No. two motor driven intermediate transmission components are coupled for speed.The present invention realizes the coordinated of two motors by planet Traction Drive bearing type speed reducer, may make each motor to work always in high efficiency range, improves the working efficiency of wheel hub, achievees the purpose that energy conservation, extends course continuation mileage.
Description
Technical field
The invention belongs to automobile technical field, in particular to a kind of bi-motor coupling planet Traction Drive bearing type slows down electric
Runner hub.
Background technique
Existing electric wheel hub structure mainly by axis, the shell being mounted on axis by bearing, be set in the housing
Motor and the components such as planetary gear speed reducing mechanism and clutch constituted, for rotor and hub body in hub motor
Rotation usually requires independent bearing and is supported, and rotor, the planet carrier of planetary reducer and hub body are equal
Respectively by independent bearing support rotary, this structure considerably increases the quantity of hub motor middle (center) bearing, causes wheel hub electric
Machine complicated integral structure improves the difficulty of its production cost and assembly, and the components such as motor, retarder and bearing
It needs to be sequentially arranged in the axial direction, considerably increases the axial dimension of wheel hub structure, cause the arrangement space of hub positions
Limited, since level-one is usually only arranged in the limitation deceleration mechanism of its arrangement space, the power of motor passes through primary speed-down mechanism
To the output of motor side and drive hub rotation, it is driven relatively low, it is difficult to using high-speed motor as the power of hub motor,
Lead to wheel hub there are torsion that small, revolving speed is low, noise is big.
A kind of double reduction bearing-type hub motor is disclosed in CN106655613A, motor is drawn by two-stage planet
Speed reduction bearing carries out power transmission, and planet, which is drawn, to be cooperated between planet rolling body and inside and outside circle in speed reduction bearing using smooth surface,
The unbearable axial load of this structure, to guarantee that can bear certain axial load needs to add additional axial direction positioning device,
Leading to speed reduction bearing, structure is complicated, size is larger in the axial direction for overall structure, and class formation will lead to when bearing axial force
Efficiency is greatly reduced；During the work time, the moment of resistance or moment of flexure that output shaft is subject to can act on planet rolling body this structure,
Planet rolling body both ends are caused to generate torque difference, this torque difference will lead to the torsion of planet rolling body in its axis direction run-off the straight
Deformation, this deformation will lead to vibration and noise and increase, efficiency decline, and when operating, which gets stuck, leads to run not smooth, or even meeting
Stuck phenomenon occurs；
In order to solve the above problem, a kind of compact-sized electric wheel hub is needed, there is high power density, can prevent from vibrating,
Reduce noise, improve efficiency and eliminates stuck phenomenon, it can be achieved that the advantages that speed couples.
Summary of the invention
In view of this, the present invention provides a kind of bi-motor coupling planet Traction Drive bearing type reduction electric hub, have
High power density can prevent from vibrating, and reduce noise, improve efficiency and eliminate stuck phenomenon, it can be achieved that the advantages that speed couples.
Bi-motor of the invention couples planet Traction Drive bearing type reduction electric hub, including the traction of wheel hub, planet passes
Dynamic bearing type speed reducer and No.1 motor and No. two motors；The wheel hub has accommodating chamber, is provided with planet in the accommodating chamber
Traction Drive bearing type speed reducer, No.1 motor and/or No. two motors；In the planet Traction Drive bearing type speed reducer too
Positive wheel, planet carrier, outer ring three combined in any order correspond respectively to the power in planet Traction Drive bearing type speed reducer
Input terminal, power output end and intermediate transmission component, the No.1 motor driven power intake are used to provide power and pass through
The rotation of power output end drive hub, No. two motor driven intermediate transmission components are coupled for speed.
Further, the planet Traction Drive bearing type speed reducer includes transmission inner shaft, outer ring, planet rolling body and planet
The planet Traction Drive train that frame is collectively formed, the planet rolling body by way of frictional drive with transmission inner shaft and outer ring
Cooperation.
Further, the planet Traction Drive bearing type speed reducer is set in the stator of motor or the inner cavity of rotor.
Further, the planet rolling in vitro justify outer ring inner circle between and planet rolling in vitro circle with transmission inner shaft outside
Matching pair is formed by annular protrusion and annular channel between circle.
Further, the annular protrusion and annular channel are used to generate the positive pressure of frictional drive in an interference fit
Power.
Further, the annular protrusion be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft outer circle
In upper and outer ring inner circle.
Further, the planet carrier includes two left part planet carriers being linked together positioned at planet rolling body axial ends
With right part planet carrier, the planet rolling body and its wheel shaft are rotatably assorted and are mounted on two planet carriers, the wheel shaft outer circle
It is provided at least one set of mutually matched ring raceway between rolling element inner circle, is provided with roller in the ring raceway.
Further, the planet rolling body can axially disposed multiple row, adjacent two column planet rolling body is along transmission inner shaft week
To being uniformly staggered.
Further, the planet Traction Drive bearing type speed reducer includes the primary planet Traction Drive bearing of two-stage transmission
Type speed reducer and secondary planet Traction Drive bearing type speed reducer, the power of the primary planet Traction Drive bearing type speed reducer
Output end drives the power intake of No. two planet Traction Drive bearing type speed reducers and is rotated by its output end drive hub,
The power intake of the No.1 motor driven primary planet Traction Drive bearing type speed reducer is used to provide power, and described No. two
The intermediate transmission component of motor driven primary planet Traction Drive bearing type speed reducer is coupled for speed.
Further, the primary planet Traction Drive bearing type speed reducer transmission inner shaft, planet carrier and outer ring respectively correspond
Power intake, power output end and intermediate transmission component in primary planet Traction Drive bearing type speed reducer；Described two
Grade planet Traction Drive bearing type speed reducer transmission inner shaft, planet carrier and outer ring correspond respectively to secondary planet Traction Drive bearing
Power intake, intermediate transmission component and power output end in type speed reducer.
Beneficial effects of the present invention:
By the operation of above-mentioned different mode, it may make each motor to work always in high efficiency range, improve wheel hub
Working efficiency achievees the purpose that energy conservation, extends course continuation mileage；
The present invention can pass through revolving speed coupling driving mode, the stepless speed regulation of Lai Shixian wheel hub, so that electric car
With enough dynamic property；
Planet Traction Drive bearing type speed reducer is used in wheel hub of the invention, utilizes transmission inner shaft, planet rolling body, outer
The normal pressure enclosed between contact surface carries out the radial support of axis, using between transmission inner shaft, planet rolling body, outer ring contact surface
Frictional force carries out passing movement and power, to realize epicyclic friction gear transmission and bearing function, this structure collection slows down and bearing
Function is integrated, and for using the retarder of gear transmission mode, has that structure is simple, bearing smooth running, when transmission
Overload can skid and have many advantages, such as automatic antioverloading function, and the arrangement planet rolling body and transmission inner shaft of this structure are pressurized,
Therefore it is not high for the diametric requirements of planet rolling body and transmission inner shaft, it can be by reducing planet rolling body and being driven the diameter of inner shaft
The radial arrangement size for reducing planet traction train, reduces the overall dimensions of wheel hub, so that entire wheel hub structure is compact；
The mutual limitation of annular protrusion and annular channel in the present invention can improve transmission inner shaft and planet rolling body and
The support situation of planet rolling body and outer ring, and the bending stiffness of planet Traction Drive bearing type speed reducer is improved, and increase
It connects and improves driving torque and power；Pass through annular protrusion and annular ditch between planet rolling body and transmission inner shaft and outer ring
Road cooperates so that this planet traction wheel system can carry axial load, annular protrusion and annular channel side wall when carry axial load
Mutually compress the contact area for increasing its frictional drive, it is ensured that the normal operation of retarder simultaneously increases driving torque；；This knot
Structure reduces the axial positioning structure to components such as transmission inner shaft, planet carrier and planet rolling bodies, simplifies the knot of retarder
Structure reduces its axial dimension, can further decrease the axial arrangement size of wheel hub, make its it is compact-sized be easily installed, reduce
Requirement to installation space, increases Installation Flexibility；It is limited by the mutual structure of annular protrusion and annular channel, works as row
When star rolling element both ends generate torque difference, the inclination deformation in planet rolling body axially direction can be effectively limited, is effectively prevent
The generation of vibration reduces noise, eliminates the phenomenon that gets stuck, and improves its and runs fluency；In axial same straight line size, this structure
So that the contact area between planet rolling body and transmission inner shaft, outer ring increases, the stress state of contact surface is improved, is reduced
Stress is concentrated, and transmission power and transmission efficiency are improved；
Planet Traction Drive bearing type speed reducer of the invention is arranged in the rotor of motor or the cavity of electronics, is reducing
Under the premise of motor volume, its radial dimension is reduced by the improvement for drawing train to planet, it is fixed to make it easier to be installed in motor
In the cavity of son or rotor, solving planet traction, train radial dimension is excessive leads to not and motor stator or rotor internal cavity phase
The problem of cooperation, this structure become one planet Traction Drive bearing type speed reducer with motor, greatly reduce wheel hub
Space needed for axially mounted, keeps its compact-sized, improves Installation Flexibility；
The present invention passes through I and II planet drawing transmission shaft in the case where guaranteeing its axial, lesser situation of radially installed size
The superposition for holding the reduction ratio of type speed reducer can reach higher transmission ratio, so that the revolving speed of motor can be improved, and then reduce motor
Volume improves power density；
The present invention simplifies the structure of motor and planetary reduction gear bearing, the matched global consistency of the two is improved, so that whole
Reach good matching between a each components of system, stator core area can increase by its structure optimization, so as to improve
The transmission path of the magnetic line of force, improves electromagnetic performance, further increases the power and efficiency of motor；
The invention will be further described with reference to the accompanying drawings and examples.
Fig. 1 is schematic structural view of the invention；
Fig. 2 is principle of the invention structural schematic diagram；
Fig. 3 is the A point enlarged structure schematic diagram of Fig. 1；
Fig. 4 is annular protrusion and annular channel the first fit system structural schematic diagram；
Fig. 5 is second of fit system structural schematic diagram of annular protrusion and annular channel；
Fig. 6 is annular protrusion and annular channel the third fit system structural schematic diagram；
Specific embodiment
Fig. 1 is schematic structural view of the invention；Fig. 2 is principle of the invention structural schematic diagram；Fig. 3 is the A point enlarged structure of Fig. 1
Schematic diagram；Fig. 4 is annular protrusion and annular channel the first fit system structural schematic diagram；Fig. 5 is annular protrusion and annular ditch
Second of road fit system structural schematic diagram；Fig. 6 is annular protrusion and annular channel the third fit system structural schematic diagram；
As shown in the figure: the bi-motor of the present embodiment couples planet Traction Drive bearing type reduction electric hub, including wheel hub
3, planet Traction Drive bearing type speed reducer and No.1 motor 1 and No. two motors 2；Planet traction is provided in the accommodating chamber
Drive bearing type speed reducer, No.1 motor and/or No. two motors；The sun in the planet Traction Drive bearing type speed reducer
Wheel, planet carrier, power that the combined in any order of outer ring three corresponds respectively in planet Traction Drive bearing type speed reducer are defeated
Enter end, power output end and intermediate transmission component, the No.1 motor driven power intake is used to provide power and passes through dynamic
The rotation of power output end drive hub, No. two motor driven intermediate transmission components are coupled for speed；There is an accommodating chamber on wheel hub, holds
It receives and is provided with planet Traction Drive bearing type speed reducer, No.1 motor and/or No. two motors in chamber, i.e., settable three in accommodating chamber
Any combination of person, one of three can be separately set in accommodating chamber, and any two component in three may be disposed at appearance
It receives in chamber, certainly to improve structural compactness, one, No. two motor and planet Traction Drive bearing type speed reducer be may be provided at
In accommodating chamber, planet Traction Drive bearing type speed reducer be may be disposed in the cavity of one or No. two rotor or stator, this knot
Structure can be integrated by one, No. two motor and planet Traction Drive bearing type speed reducer and wheel hub, compact-sized, increases
Wheel hub global consistency；Different components can reach not as input terminal and output end in planet Traction Drive bearing type speed reducer
Same effect, such as sun gear then achieve the effect that deceleration torque increase, sun gear conduct as output end as input terminal, planet carrier
Input terminal, outer ring then achieve the effect that reversion deceleration torque increase as output end, and planet carrier is as input terminal, sun gear as output
End has the function that speedup, and outer ring has the function that invert speedup as output end, can equally lead to as input terminal, sun gear
Cross outer ring as input terminal, planet carrier as output end or planet carrier as input terminal, outer ring as output end to reach not
Same effect, details are not described herein again, and one, No. two motor is permanent magnet synchronous motor, and existing all kinds of motor forms can be used such as
External rotor electric machine etc. is not limited to traditional internal rotor permanent-magnetic synchronous motor；Intermediate transmission component can pass through No. two motor brakings
And driving, it can also be by adding brake 4 for controlling intermediate transmission component；
It is arranged by above structure, there are two types of operating modes to divide for the present embodiment；
1, single motor operating mode
Intermediate transmission component is not worked by being in on-position, No. two motors, and No.1 motor is in eDrive state；This
When No.1 motor stand alone as wheel hub provide power, outputed power and be used for by planet Traction Drive bearing type speed reducer output end
Drive vehicle operation；When vehicle braking, No.1 motor is in generating state for battery energy supply, for returning for braking energy
It receives；No.1 motor can be by inverting the function of realizing and reverse gear；
The operating mode is suitable for driven at low speed, full braking and operating condition of reversing gear.
2, motor rotating speed coupling work mode
Intermediate transmission component is by operating status, and No.1 motor and No. two motors are all in eDrive state；At this time
No.1 motor provides power for wheel hub and is exported by planet Traction Drive bearing type speed reducer output end, and No. two motors are for driving
Dynamic intermediate transmission component, planet Traction Drive bearing type speed reducer output end can adjust its revolving speed by No. two motor drivens, lead to
The stepless time adjustment of output end is realized in the driving for crossing No. two motors, and No.1 motor and No. two motors, which cooperate to draw by planet, to be passed
Dynamic bearing type speed reducer come realize revolving speed couple, this mode be mainly used for cruise or high-speed working condition；When electric car is in revolving speed coupling
It, can be according to the reality of battery by electronic control unit ECU (Electronic Control Unit) when being braked under syntype
Border operating condition is in recycling of the generating state for battery energy supply, for braking energy to control any combination of one, No. two motor；
No.1 motor can be by inverting the function of realizing and reverse gear.
By the operation of above-mentioned different mode, it may make each motor to work always in high efficiency range, improve wheel hub
Working efficiency achievees the purpose that energy conservation, extends course continuation mileage；
In the present embodiment, the planet Traction Drive bearing type speed reducer includes transmission inner shaft 5, outer ring 6, planet rolling body
7 and the planet Traction Drive train that is collectively formed of planet carrier 12, the planet rolling body is by way of frictional drive and transmission
Inner shaft and outer ring cooperation；Transmission inner shaft, outer ring, planet rolling body and planet carrier correspond respectively to planetary gear train and in the sun
Wheel, outer ring, planetary gear and planet carrier, the planet rolling body are cooperated by way of frictional drive with transmission inner shaft and outer ring；
Transmission inner shaft 5 in the present embodiment is not limited to traditional solid axle construction, and hollow tubular structure can also be used in transmission inner shaft 5, when
When being driven the axle sleeve structure that inner shaft is tubular, settable spline or be driven using the modes such as interference fit and input shaft is matched in axle sleeve
It closes, when transmission inner shaft is solid axle construction in the present embodiment, this solid shafting is equally used as input shaft to use, this structure will be in transmission
Axis is integrated with input shaft, simplifies the structure that this planet drawing transmission shaft holds type speed reducer, planet Traction Drive bearing type
Retarder carries out the radial support of axis using the normal pressure between transmission inner shaft 5, planet rolling body 7,6 contact surface of outer ring, utilizes
It is driven inner shaft, planet rolling body, the frictional force between the contact surface of outer ring and carries out passing movement and power, to realize planetary friction
Wheel is driven and bearing function, and this planet Traction Drive bearing type speed reducer integrates deceleration and bearing function, compared to use
For the retarder of gear transmission mode, this planet drawing transmission shaft holds that type speed reducer is simple with structure, bearing smooth running,
Overload, which can skid, when transmission has many advantages, such as automatic antioverloading function, the arrangement planet rolling body and transmission inner shaft of this structure
It is pressurized, thus it is not high for the diametric requirements of planet rolling body and transmission inner shaft, relative to the planet drawing transmission shaft using gear
Holding type speed reducer this programme can be subtracted by reducing planet rolling body and being driven the diameter reduction planet Traction Drive bearing type of inner shaft
The radial arrangement size of fast device, reduces the overall dimensions of wheel hub, so that entire wheel hub structure is compact.
In the present embodiment, the planet Traction Drive bearing type speed reducer is set to the stator of motor or the inner cavity of rotor
In；When the outer ring of planet Traction Drive bearing type speed reducer passes through motor driven, the rotor of outer ring and motor is driven cooperation, is excellent
The stator or rotor of outer ring and motor, can be integrally formed by the structure of outside the pale of civilization circle and rotor, simplify motor and planet Traction Drive
The structure of bearing type speed reducer improves the matched global consistency of the two, so that reaching between each components of whole system
Good matching, certainly, planet Traction Drive bearing type speed reducer and the stator of motor or the fit structure of rotor are not limited to
This, the component that the stator of motor is stationary with planet Traction Drive bearing type speed reducer is fixedly connected, the rotor and row of motor
Driven component transmission cooperation is needed in star Traction Drive bearing type speed reducer, details are not described herein again；Since this planet is drawn
The radial dimension of drive bearing type speed reducer is smaller, therefore planet Traction Drive bearing type speed reducer can be installed the stator in motor
Or in the cavity of rotor, solve that planetary reduction gear radial dimension is excessive to be led to not match with motor stator or rotor internal cavity
The problem of, this structure becomes one planet Traction Drive bearing type speed reducer with motor, greatly reduces the axial direction of wheel hub
Installation footprint keeps its compact-sized, improves Installation Flexibility.
In the present embodiment, between 7 outer circle of planet rolling body and 6 inner circle of outer ring and 7 outer circle of planet rolling body and pass
Matching pair is formed by annular protrusion 8 and annular channel 9 between dynamic 5 outer circle of inner shaft；Annular protrusion 8 and annular channel 9 can be in axis
Multiple groups are set to direction, two groups are provided in the present embodiment, annular protrusion 8 and annular channel 9 can improve transmission inner shaft and planet
The support situation of rolling element and planet rolling body and outer ring, and the bending for improving planet Traction Drive bearing type speed reducer is rigid
Degree, and increase contact connectio and improve driving torque and power；Annular protrusion 8 may be provided at the external circumferential surface of planet rolling, annular ditch
Road 9, which may be provided at, is driven inner shaft outer peripheral surface and outer ring inner peripheral surface, and the position of certain annular protrusion 8 and annular channel 9 can also be right
It adjusts, i.e. on transmission inner shaft outer peripheral surface and outer ring inner peripheral surface, annular channel 9 is arranged outside planet rolling element for the setting of annular protrusion 8
On circumferential surface, aforementioned schemes are used in the present embodiment, the axial cross section of annular protrusion 8 and annular channel 9 can be semicircular arc-shaped, ellipse
The shapes such as arc-shaped, trapezoidal or triangle, preferably semicircular arc-shaped or oval arcuation section in the present embodiment, using annular protrusion 8
There is certain automatic aligning effect with the structure that annular channel 9 cooperates；Lead between planet rolling body and transmission inner shaft and outer ring
It crosses annular protrusion 8 and annular channel 9 to cooperate so that this planet drawing transmission shaft holds type speed reducer and can carry axial load, works as carrying
Annular protrusion 8 and 9 side wall of annular channel, which mutually compress, when axial load increases its contact area, increases driving torque instead and improves
Transmission efficiency；This structure reduces the axial positioning structure to components such as transmission inner shaft, planet carrier and planet rolling bodies, letter
The structure for having changed planet Traction Drive bearing type speed reducer, reduces its axial dimension, can further decrease the axial ruler of wheel hub
It is very little, make its it is compact-sized be easily installed, reduce the requirement to installation space, can be easily mounted to hub interior, increase installation
Flexibility；It is limited by the mutual structure of annular protrusion 8 and annular channel 9, it, can when planet rolling body both ends generate torque difference
The effectively inclination deformation in limitation planet rolling body axially direction, effectively prevent the generation of vibration, reduces noise, and elimination is got stuck
Phenomenon improves it and runs fluency；In axial same straight line size, this structure makes planet rolling body with transmission inner shaft, outside
Contact area between circle increases, and improves the stress state of contact surface, reduces stress concentration, improves transmission power and biography
Efficiency of movement；In the present embodiment, transmission inner shaft, planet rolling body, the frictional drive between the contact surface of outer ring answer preferred wet friction to pass
It passs, i.e., added with lubricant between frictional contact surface, to improve transmitting power, while reducing fretting wear, improve efficiency and make
With the service life, in addition, can uniformly extend the axial ruler of planet rolling body to guarantee planet rolling body and outer ring and being driven inner shaft and contact
Very little or axially disposed multiple row planet rolling body.
In the present embodiment, the annular protrusion and annular channel are being used to generate in an interference fit frictional drive just
Pressure；The planet Traction Drive bearing type speed reducer of the present embodiment is in assembly, after being driven inner shaft and the combination of planet rolling body
The diameter of annular protrusion largest enveloping outer ring has certain magnitude of interference dress slightly larger than the maximum inner diameter of the annular channel on outer ring
Match, when the annular channel 9 of annular protrusion 8 and 9 position of annular channel to timing, after being equally driven inner shaft and the combination of planet rolling body
The diameter of minimum envelop outer ring is slightly larger than the minimum diameter of the annular protrusion 8 on outer ring, this structure guarantees annular protrusion 8 and annular
After channel 9 assembles, the two using interference fit, sunk area between the two neighboring annular protrusion 8 of planet rolling body and with
It is gap-matched and is interference fitted between elevated regions between the corresponding two neighboring annular channel 9 of sunk area
Can, reduce the accuracy of manufacture of components for convenience of the two assembly, clearance fit can be used, is improved to further increase contact area
Interference fit can be used in transmission efficiency, when herein using interference fit when, adjacent annular protrusion 8 and with in-between recess
Region may be configured as seamlessly transitting, the wavy shaped configuration of sunk area and annular protrusion composition similar to SIN function, this structure
Its contact area can be further increased and reach higher transmission efficiency, can further limit the deformation of planet rolling body 7, so that this
The performance of bearing type speed reducer various aspects gets a promotion, and specific details are not described herein again；When annular protrusion 8 and annular channel 9 use
When arc section, as shown in Figures 4 to 6, there are three types of the modes of interference fit, as shown in figure 4, being the diameter of annular protrusion 8
Less than 9 diameter of annular channel, contact at the wave crest of annular protrusion 8 with being formed at 9 trough of annular channel at this time, when by axial force
When small offset occurs for the crest location of annular protrusion 8, its sliding can be made to restore home position by the cambered surface of annular channel 9
Reach aligning effect, be illustrated in figure 5 annular protrusion 8 diameter be greater than 9 diameter of annular channel, 8 wave crest two sides of annular protrusion with
9 cambered surface of annular channel forms contact, equally when small offset occurs for the position of annular protrusion 8, can pass through annular channel 9
Cambered surface makes its sliding restore home position and reaches aligning effect, as shown in fig. 6, the diameter of annular protrusion 8 is equal to annular channel 9 directly
Diameter, the two is at a fully engaged, this engagement its contact surface of effect is maximum, and transmission power is maximum and aligning effect is best, certain convex annular
Similarly there is above-mentioned three kinds of matching relationships when playing 8 and other sectional shape structures of use of annular channel 9, details are not described herein again；
Transmission inner shaft and planet rolling body after assembling in the present embodiment will generate certain compressive deformation, and outer ring generates
Dilatancy, thus pressing force needed for generating planet rolling body friction Traction Drive, when planet rolling body and outer ring and biography
When between dynamic inner shaft using wet friction transmission, transmission inner shaft, planet rolling body, outer peripheral surface should pass through Surface hardening treatment,
Three can be worked after mutually compressing in the very high lubricant of pressure viscosity value index number, and it is strong that contact area generates shearing resistance under high pressure
Very high lubricating oil film is spent, generates frictional traction using the lubricating oil film, to improve transmission power, while reducing friction mill
Damage.
In the present embodiment, the annular protrusion be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft
In outer circle and in the inner circle of outer ring；The size of planet rolling body is less than the size of transmission inner shaft and outer ring in the axial direction, such
The material of required removal when can reduce process component is set, processing efficiency is improved, reduces difficulty of processing.
Planet Traction Drive bearing type speed reducer in the present embodiment, planet carrier 12 are driven by planet rolling body wheel shaft 11
Dynamic, the planet carrier 12 is rotatably assorted in transmission inner shaft；Planet rolling body 5 is installed in planet rolling body wheel shaft 11 in the present embodiment
On, planet rolling body wheel shaft is the planet wheel spindle for being used as planet Traction Drive train, planet rolling body wheel shaft 11 and planet rolling
Bearing realization can be used between body 7 to be rotatably assorted, or process raceway on planet rolling element wheel shaft and planet rolling is installed
Body realization is rotatably assorted；Wherein the structures such as settable spline or shaft coupling and output shaft are sequentially connected on planet carrier 12, certainly, row
Carrier 12 can also be integrally formed with output shaft, to simplify the structure of its link position；
In the present embodiment, the planet carrier 12 includes positioned at two left sides being linked together of 7 axial ends of planet rolling body
Portion's planet carrier and right part planet carrier, what 11 both ends of planet rolling body wheel shaft were rotatably assorted is mounted on two planet carriers；This
Left and right portion's planet carrier of embodiment, which is bolted, to be integrated, this structure facilitates the installation of retainer, left and right portion's planet carrier
Planet rolling body 7 is supported, the global consistency of components is improved, in conjunction with the restriction effect of annular protrusion 8 and annular channel 9,
Further limitation 7 run-off the straight of planet rolling body deformation.
In the present embodiment, at least one set of mutually matched annular rolling is provided between the wheel shaft outer circle and rolling element inner circle
Road 13 is provided with roller 14 in the ring raceway；There are cyclic annular arc-shaped track groove, wheel shaft in wheel shaft outer circle and rolling element inner circle
Track groove in outer circle and rolling element inner circle constitutes ring raceway；Roller, which is located in ring raceway, can bear certain axial force, rolling
Son can be interference fitted with raceway or clearance fit can be born higher when passing through interference fit between roller and raceway
Axial force；And wheel shaft, roller and rolling element three cooperation are provided with the function of bearing, and bearing and each components are integrated
It is integrated, improves structural compactness；The wheel shaft of this structure planet rolling element is mounted on supporting wheel hub on planet carrier, without separately setting
Hub bearing simplifies the overall structure of wheel hub；Multiple row can be axially arranged in wheel shaft outer circle and rolling element inner circle in raceway, by more
Column setting improves its transmission stability and axial force bearing capacity, and details are not described herein again；
In the present embodiment, the planet rolling body can axially disposed multiple row；Multiple row planet rolling body can make planet rolling
Contact between body and outer ring and transmission inner shaft is more uniform, increases the contact area of planet rolling body and Internal and external cycle, reduces row
The contact stress of star rolling element effectively improves the load capacity of retarder, can be adjacent two when planet rolling body uses multiple row
Center row carrier for connecting adjacent two column planet rolling body wheel shaft, or adjustment each column row are set between column planet rolling body
The assembly magnitude of interference of star rolling element, so as to adjust the transmission power of planet Traction Drive bearing type speed reducer；Adjacent two column planet
Rolling element 7 is circumferentially uniformly staggered along transmission inner shaft；This arrangement can be improved planet rolling body 7 along transmission inner shaft and
The density of outer ring circumferential direction, the stress for making outer ring and deformation more evenly, are driven more stable.
In the present embodiment, adjacent two column planet rolling body is circumferentially uniformly staggered along transmission inner shaft；This arrangement
Planet rolling body 7 be can be improved along the density of transmission inner shaft and outer ring circumferential direction, more evenly, transmission is more for the stress for making outer ring and deformation
Steadily.
In the present embodiment, the planet Traction Drive bearing type speed reducer includes the primary planet Traction Drive of two-stage transmission
Bearing type speed reducer and secondary planet Traction Drive bearing type speed reducer, the primary planet Traction Drive bearing type speed reducer
Power output end drives the power intake of No. two planet Traction Drive bearing type speed reducers and passes through its output end drive hub
Rotation, the power intake of the No.1 motor driven primary planet Traction Drive bearing type speed reducer are used to provide power, institute
The intermediate transmission component for stating No. two motor driven primary planet Traction Drive bearing type speed reducers is coupled for speed；The braking
Device 4 is used to control the intermediate transmission component of primary planet Traction Drive bearing type speed reducer；The present invention is provided with two column planets and leads
Draw drive bearing type speed reducer, electric car reduction ratio is met by the superposition of planet Traction Drive bearing type speed reducer reduction ratio
Requirement, while planetary reduction gear uses the planet Traction Drive bearing type speed reducer structure of frictional drive, due to its axial ruler
It is very little smaller, it is easy to arrange two column planet Traction Drive bearing type speed reducers in the axial direction of wheel hub；For identical reduction ratio,
According to the wheel hub of the planetary reduction gear of gear structure multi-column type, the axial dimension of retarder is big, and retarder and motor
Axially spaced arrangement is needed, the axial dimension that will lead to entire wheel hub greatly increases, according to gear structure single-column type retarder
Wheel hub, can greatly increase to meet the radial dimension of requirement retarder of reduction ratio and transmission power, be rubbed using the present invention
The planet Traction Drive bearing type speed reducer of transmission is wiped, under the premise of arranging two column planet Traction Drive bearing type speed reducers both
Can guaranteeing wheel hub, axially arrangement size is smaller, it is also ensured that radially arrangement size is smaller for wheel hub, and it is entirely empty to reduce wheel hub
Between layout structure, reduce space layout difficulty.
In the present embodiment, the primary planet Traction Drive bearing type speed reducer transmission inner shaft, planet carrier and outer ring difference
Corresponding to power intake, power output end and the intermediate transmission component in primary planet Traction Drive bearing type speed reducer；Institute
It states secondary planet Traction Drive bearing type speed reducer transmission inner shaft, planet carrier and outer ring and corresponds respectively to secondary planet Traction Drive
Power intake, intermediate transmission component and power output end in bearing type speed reducer；Secondary planet Traction Drive bearing type subtracts
The planet carrier of fast device with vehicle frame for being fixedly connected；Setting through this structure achievees the purpose that deceleration torque increase, this structure two
Motor 2 is set to hub interior, I and II planet Traction Drive bearing type speed reducer, which can be independently arranged also, can be set in one,
The stator or internal rotor of No. two motors are easy to arrange No.1 motor 1 and No. two motors 2 to reduce axial arrangement this structure of size,
The overall space of wheel hub is rationally distributed.
In the present embodiment, the planet carrier of the secondary planet Traction Drive bearing type speed reducer, which is fixedly connected with, to be used for and vehicle
Frame or the linking arm 10 of suspension connection, are fixed by linking arm and vehicle frame or suspension, so that wheel hub is installed on car body, this wheel hub
With independent power device, revolving speed is adjusted in wheel hub itself；
In the present embodiment, No. three motors can also be increased, No. three motors are for driving primary planet Traction Drive bearing type
The power output end of retarder or secondary planet Traction Drive bearing type speed reducer, the revolving speed of No. three motors and its power output end
Revolving speed match so that output end torque superposition have the function that moment coupling, the big of vehicle can be met through this structure
Torque demand, at the same can also separately adjustable output torque, when under turning condition, pass through adjust left and right wheels torque increase by one
The athwartship moment that a auxiliary wheel turns to, to improve the mobility of vehicle, increases No. three electricity to reduce the turning radius of vehicle
After machine, four kinds of operational modes can reach by the matching of three motors, i.e., single motor operating mode, revolving speed coupling work mode,
Moment coupling operating mode, hybrid coupled drive mode, details are not described herein again.
There is the round accommodating chamber being coaxially arranged in the present embodiment, on wheel hub, accommodating chamber is open at one end, is arranged in wheel hub
There are primary planet Traction Drive bearing type speed reducer and No. two motors, wherein primary planet Traction Drive bearing type speed reducer is placed in
In the rotor cavity of No. two motors, No. two motors use external rotor electric machine, the rotor and primary planet Traction Drive of No. two motors
The outer ring of bearing type speed reducer is integrally formed, and the stator of No. two motors is placed in rotor and primary planet Traction Drive bearing type slows down
Between the outer ring of device, the stator of No. two motors is fixedly connected with the planet carrier of secondary planet Traction Drive bearing type speed reducer, and two
The planet carrier of grade planet Traction Drive bearing type speed reducer with vehicle frame for connecting, secondary planet Traction Drive bearing type speed reducer
It is placed in the right side of primary planet Traction Drive bearing type speed reducer, i.e., secondary planet Traction Drive bearing type speed reducer, which is located at, accommodates
Chamber open end side is provided with No.1 motor, the rotor of No.1 motor on the right side of secondary planet Traction Drive bearing type speed reducer
Transmission is matched with input shaft, and input shaft rotatably passes through planet carrier, the planet of secondary planet Traction Drive bearing type speed reducer
Rolling element is fixedly connected with the planet rolling body of primary planet Traction Drive bearing type speed reducer, and input shaft and primary planet are drawn
The planet rolling body by integral forming of drive bearing type speed reducer, planet rolling body and input shaft are integrated, wherein input shaft
Left end is supported by the closed end of wheel hub, and the right end of input shaft passes through the rotor supports of No.1 motor, the closed end inside of wheel hub
There is inside bearing block outstanding, the left end of input shaft is rotatably assorted by bearing and bearing block, right end and the No.1 electricity of input shaft
The rotor of machine is cooperated by spline drived, and No.1 motor is fixed in motor mounting cup, and motor mounting cup is fixedly connected on second level
The planet carrier on the right side of the planet carrier of planet Traction Drive bearing type speed reducer, secondary planet Traction Drive bearing type speed reducer is right
Bearing block is convexed to form respectively inwards on the inside of side and motor mounting cup right part, and the two ends of rotor of No.1 motor passes through bearing respectively
It is rotatably assorted with two bearing blocks, the stator of No.1 motor, which secures, to be connected in motor mounting cup；The arrangement of No.1 motor is simultaneously
It is without being limited thereto, No.1 motor can be installed in wheel hub accommodating chamber, and secondary planet Traction Drive bearing type speed reducer is installed
In the rotor or bore of stator of No.1 motor, details are not described herein again, is arranged by above structure, and entire electric wheel hub structure is tight
It gathering, output shaft is effectively supported, and based on input shaft entire retarder and motor overall operation is stablized,
Enhance the stability of system.
Finally, it is stated that the above examples are only used to illustrate the technical scheme of the present invention and are not limiting, although referring to compared with
Good embodiment describes the invention in detail, those skilled in the art should understand that, it can be to skill of the invention
Art scheme is modified or replaced equivalently, and without departing from the objective and range of technical solution of the present invention, should all be covered at this
In the scope of the claims of invention.
Claims (10)
1. a kind of bi-motor couples planet Traction Drive bearing type reduction electric hub, it is characterised in that: led including wheel hub, planet
Draw drive bearing type speed reducer and No.1 motor and No. two motors；
The wheel hub has accommodating chamber, be provided in the accommodating chamber planet Traction Drive bearing type speed reducer, No.1 motor and/or
No. two motors；
The combined in any order of sun gear, planet carrier, outer ring three in the planet Traction Drive bearing type speed reducer is distinguished
Corresponding to power intake, power output end and the intermediate transmission component in planet Traction Drive bearing type speed reducer, described one
Number motor driven power intake, which is used to provide power and passes through power output end drive hub, to be rotated, among No. two motor drivens
Transmission parts are coupled for speed.
2. bi-motor according to claim 1 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The planet Traction Drive bearing type speed reducer include be driven inner shaft, the row that outer ring, planet rolling body and planet carrier are collectively formed
Star Traction Drive train, the planet rolling body are cooperated by way of frictional drive with transmission inner shaft and outer ring.
3. bi-motor according to claim 2 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The planet Traction Drive bearing type speed reducer is set in the stator of motor or the inner cavity of rotor.
4. bi-motor according to claim 2 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The planet rolling in vitro justify outer ring inner circle between and planet rolling in vitro justify transmission inner shaft outer circle between pass through annular
Protrusion and annular channel form matching pair.
5. bi-motor according to claim 4 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The annular protrusion and annular channel are used to generate the normal pressure of frictional drive in an interference fit.
6. bi-motor according to claim 4 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The annular protrusion be located at planet rolling in vitro justify on, the annular channel be located at transmission inner shaft outer circle on and outer ring inner circle on.
7. bi-motor according to claim 2 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The planet carrier includes the two left part planet carriers and right part planet carrier being linked together positioned at planet rolling body axial ends, institute
It states planet rolling body and its wheel shaft is rotatably assorted and is mounted on two planet carriers, between the wheel shaft outer circle and rolling element inner circle
It is provided at least one set of mutually matched ring raceway, is provided with roller in the ring raceway.
8. bi-motor according to claim 2 couples planet Traction Drive bearing type reduction electric hub, it is characterised in that:
The planet rolling body can axially disposed multiple row, adjacent two column planet rolling body is circumferentially uniformly staggered along transmission inner shaft.
9. planet Traction Drive bearing type reduction electric hub is coupled to bi-motor described in 8 any one according to claim 1,
It is characterized by: the primary planet Traction Drive bearing type that the planet Traction Drive bearing type speed reducer includes two-stage transmission subtracts
Fast device and secondary planet Traction Drive bearing type speed reducer, the power output of the primary planet Traction Drive bearing type speed reducer
The power intake of No. two planet Traction Drive bearing type speed reducers of end driving is simultaneously rotated by its output end drive hub, described
The power intake of No.1 motor driven primary planet Traction Drive bearing type speed reducer is used to provide power, No. two motors
The intermediate transmission component of primary planet Traction Drive bearing type speed reducer is driven to couple for speed.
10. bi-motor according to claim 9 couples planet Traction Drive bearing type reduction electric hub, feature exists
In: the primary planet Traction Drive bearing type speed reducer transmission inner shaft, planet carrier and outer ring correspond respectively to primary planet and lead
Draw power intake, power output end and the intermediate transmission component in drive bearing type speed reducer；The secondary planet traction passes
Dynamic bearing type speed reducer transmission inner shaft, planet carrier and outer ring correspond respectively in secondary planet Traction Drive bearing type speed reducer
Power intake, intermediate transmission component and power output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407553.3A CN109532462A (en) | 2018-11-23 | 2018-11-23 | Bi-motor couples planet Traction Drive bearing type reduction electric hub |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811407553.3A CN109532462A (en) | 2018-11-23 | 2018-11-23 | Bi-motor couples planet Traction Drive bearing type reduction electric hub |
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| CN109532462A true CN109532462A (en) | 2019-03-29 |
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| CN201811407553.3A Pending CN109532462A (en) | 2018-11-23 | 2018-11-23 | Bi-motor couples planet Traction Drive bearing type reduction electric hub |
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| CN109866590A (en) * | 2019-04-01 | 2019-06-11 | 山东理工大学 | A kind of pure electric drive axle of power coupling and its control method |
| CN111016629A (en) * | 2019-12-31 | 2020-04-17 | 西南大学 | Central driven double-motor integrated power system |
| CN111775688A (en) * | 2020-07-22 | 2020-10-16 | 河南工程学院 | New energy automobile electric wheel hub drive unit |
| CN114987193A (en) * | 2022-06-13 | 2022-09-02 | 澎湃动力(北京)科技有限公司 | Wheel hub electric drive device and vehicle |
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| CN106655613A (en) * | 2016-11-24 | 2017-05-10 | 重庆大学 | Double-stage deceleration bearing type wheel hub motor for two-wheel electric vehicle |
| CN106864251A (en) * | 2017-02-14 | 2017-06-20 | 北京理工大学 | Wheel motor drive device |
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| US1737997A (en) * | 1922-08-28 | 1929-12-03 | Garrard Gears Ltd | Means for the transmission of power |
| US5813488A (en) * | 1996-06-14 | 1998-09-29 | Deere & Company | Electric wheel drive for a utility vehicle |
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| CN109866590A (en) * | 2019-04-01 | 2019-06-11 | 山东理工大学 | A kind of pure electric drive axle of power coupling and its control method |
| CN111016629A (en) * | 2019-12-31 | 2020-04-17 | 西南大学 | Central driven double-motor integrated power system |
| CN111775688A (en) * | 2020-07-22 | 2020-10-16 | 河南工程学院 | New energy automobile electric wheel hub drive unit |
| CN111775688B (en) * | 2020-07-22 | 2021-12-31 | 河南工程学院 | New energy automobile electric wheel hub drive unit |
| CN114987193A (en) * | 2022-06-13 | 2022-09-02 | 澎湃动力(北京)科技有限公司 | Wheel hub electric drive device and vehicle |
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